Question

daca a =1/4 numărul l2a-3l+l2a+1l este egal cu. plsssssss dau coroana . ​

Answer 1

$|2a - 3| + |2a + 1| \\ = \left |2 \times \frac{1}{4} - 3\right | + \left |2 \times \frac{1}{4} + 1\right | \\ \\ = \left| \frac{1}{2} - 3\right | +\left | \frac{1}{2} + 1\right| \\ \\ =\left | \frac{1 - 6}{2} \right| + \left | \frac{1 + 2}{2}\right| \\ \\ = \frac{5}{2} + \frac{3}{2} \\ \\ = \frac{8}{2} \\ \\ = 4$

Answer 2

Răspuns:

Explicație pas cu pas:

a = 1/4

2a = 2*1/4 = 2/4 = 1/2

1/2 - 3 = 1/2 - 6/2 = -5/2

1/2 + 1 = 1/2 + 2/2 = 3/2

I-5/2I + I3/2I = 5/2 + 3/2 = 8/2 = 4